Syringe



Oct; 23, i923. 1,471,

A. BANDMAN SIRID-IGE Filed MaICh 19 1921 Patented ct. 23, i923.

Unirse stares anni QFFICEQ i ALBERT BANDMAN, .0F NEVI YORBQKN. Y.

SYRINGE.

Application filed March 19, 1921. Serial No. 453,563. l

To all wiz-0m it may concern.' Y K r j Be it known that I, ALBERT BANDMAN, a citizen of the United States, residing atA New York, inthe county ofNew York and State of VNew York, have invented certain vnew and useful Improvements in Syringes; and I do declare the following to be a full, 'clear, and` exact description of the invention, such as will enable others skilled in the art to sh'ell,fand the caps at opposite ends may be iiciency of theseal.

To the accomplishment of the foregoing readily assembled and disassembled as occasion demands without impairing the ef-,y

and such otherobject-s as may hereinafter appear the invention consists in the'featgures hereinafterparticularly described and then soughtto be clearly'deiined by the claims, reference being had-to the accompanying drawing forming a part hereof, and in whichj Figure l is a side elevation of thesyringe with all parts assembled; ,l

' Figure 2 is a vertical section through the syringe, taken at right angles tofFigure 1;; Figure 3 is a perspective ofthe shellor casing and inner glass barrel, with 'other parts omitted;

Figure 4 is a lower cap of the syringe. Y Y f In'the drawingy the numeral 1 designates the Vinner glass barrel which receives the medicament or liquidr for injection and in whichis fitted to reciprocate therein the plunger v2 whose outside diameter corresponds to the inside diameter of the glass barrel, 'the plunger being provided at yits upper end with the angular extending hand or thumb rest 3 for movement of the plunger.,4 The glass barrelis encased vor' enclosed vertical section through the in a metal shellor` casing 4 which has ay length slightly less than that 0f the glass barrel so that both ends of the barrel may extend beyond the ends of the shell to' serve a purpose hereinafter stated. f The shell has portions of its wall removed? tok form an opening or openingsy 5 through which may be observedthe contents of the glass barrel, which latter'may be inscribed with Va scale 6 to serve las an indicatorfor the measured dose of medicament to be administered, andbothendsof the shell are provided externally with threads 7` for theattachment of'end caps formed as hereinafter described for securing the shell and barrel together and also forconiining andplacing under compression washers for eiecting a noneleaking connection yor seal between' the glass barrel and securing caps. Each cap is formed in aspecial-` manner to more eficiently 4discharge the function for which specially designed. The lower cap is-desig! f nated by the; numeral 8`V and is cup-shaped and formed internally with-screw threads 9 to engage the external threads of the shell `4 and'withY a centrally disposed hollow nipple lO extending upwardly from the bottom ofthe cap, adapted to lit withinthe end of the glass barrel, and encircled by an annular rib or ridge 11 extending up from the bottom of the cap and'disposed to be in alinement with the end of the glass barrel, and is formed externally with a threaded apei`V- tured nipple 12 projecting from the bottom of the cup and adapted to have screwed thereon the hub 13 Vof the hypodermicl needle 14. The upwardlyr extending nipple l() serves to center the glass barrel and to hold in place beneath ytheprojecting end of kthe glass `harrel `any desired` number of washers 15, which in the present land preferred instance are v,felt washersc`hemically prepared the glass tube, andare confined hy the rwalls of the cap and the rupwardly projecting nipple 10 so that Aa practically tight, non-leakable joint yof sterilized liquidproof felt `is formed at the lowerend of the, syringe. Thev upper vend of theV glass barrel and metall shell areclosedj-by*acup-shaped cap 16 hav-r' .ing interior threads v 17.y to screw onto the metal shell and formed with an upwardly interior with an annular rib or ridge 1`9`dis'- posed in alineinent with the projecting end of the glass barrel so that any'desired, number of washers 15, preferably chemically treated to render themV liquid proof and sterilized, as at the other end of the syringe, will be compressed by` the-projecting end ot the glass barrel and the internal annular rib`f19", whenA the cap'is screwedintoplace, and thus form anv eiective'tightse'al at the joint betweenthe cap, glasshbarrel and'nietal shell. Thefmetal caplf/is provided with a f inger-grip 20', preterablytorined integral therewith, and ontof its'fthreaded stenr 18 there is-'screwediafstuing=box cap 21 formed on the'r interior'ofitsytop with an annular rib: for ridgeI 22' disposed in; alinernent with an'upwardlyC extending'- rib -23 on/ the end offstem 18so thatafdesred number ot washi ers-24; preferably felt-washers v'like the-others mentioned, will be= compressed and; held tightly iny place between thefwalls` ofthe ycap andiy the, plunger@ and thus'l formi a tight, liquidi proof stuhng -box forA the plungerY of the: syringe.

The@l hub-13"of theneedle' 14A is fornied with an' a-nnularrib or ridgeQ whiclrwill inibed itself-'in and compressa metal-washer 26iaroundt-he nipple 1251 o'tfcap' 8 when the needle'y hub isv screwed# into'- place.y

In' assembling/the parts, the plunger or piston 2isIinsertedthrou-gh the cap 1G with its'en-d projecting aboutaninch below the edge of the cap; the washers are then slipped* over thet piston and pressed into the cap ,the metal shell is then screwed into the cap; the gl'assbarrel is then-.slipped over the plunger or piston; the lower cap 8 with the felt washers placed therein around its nipple 10 is then placed in position, with its nippleentering'theglassfbarrel, and then screwed onto' thel threaded end of the metal shell, with the resultth'attheI telt washers at the opposite ends ofthe-v glassbarrel are compressed between the: protruding ends of the barrel and the inwardlyu extl'endingvribs` or ridges ot'the upper and lower caps yso that opposite ends of* the barrel andthe ribsof the' upper and lowerI caps; are embeddedl inthe telt washers and the edges ofA the washers are forcedgagainst the walls of the caps andiagai'nst theplunger or piston at the upp'erfcap andthe upwardly extend#y ing nipple of the lowercap soV that a tight, liquid prooi` lj vointiis VVformed" at the lower and;

the supper ends' ofi thieglasszbarrel.

(Ine` important. feature of thejinvention isn inri the-opposite; end'SjotiE 1the;-`ni 'edicainent bar; rel protruding orrpr,ojectingv beyond the op#k posite endsfoftheencasing"shellsosthat with the-washers appliedA at Vopposite'ends ofgthe barrel-if and '-containedfwithir the cl` sure,caps they will be compressed i hetween; lthe ends ot' the barrel and the caps on screwing the caps intolplace .and thus; produce aY tight joint at both ends ofthe barrel. Another important feature is in providing each closure Cap with an internal annular rib or ridge in alinement with the end of the barrel so that as the washers are compressed the ends of the barrel and the internal ribs of the caps will embed in the washers thus lirrnly holding the washers in place under a state of compression. l

Another. important feature is the pro-k vision :of sterilizedsubstantially liquid-proof telt washers between theends ofthe medic,- ament barrel and the closure capsv at opposite endsotthe b'arreljsok that the endsfot the barrel willbecorne embeddedfin felt un: .der compression in ordery to make a tight substantially liquid-proof, joint at such points.' Another important feature ,is the relative; poistioning of the medicament barrel, encasing shell, caps andv washers which permits the easy assenablingandl disassembling of.. the parts, without displacenient` of the'l washers from position tdeitect a tightjoint whenjassernbledl. y

Having describedv my invention and set orthits merits whatlclaimis: s

- 1. In a syringe, an outer shell, anurinner medicament barrel? having its opposite, ends protruding-beyond the `endS. off the shell, closure caps'applied to opposite endsotfthe shell, substantially leak-proof soft` washers contained within the caps and having the, ends of the .barrelliinbedded tliereinwiththe washers under compressionk to distend the washers laterally, anda piston with-inthe barrel.

2. In a syringe, an outer shell, aninner medicament barrel havingvits opposite en ds protruding beyond. the` endsoff' the i shell, closure caps applied to opposite ends ofthe shell and each. provided with an internal annular rib in alinement with the end of the barrel, washers contained within the caps and interposed between the yends iofthe barrel and the annular. rib.y of the respectiye caps and having the ends of the barrel and the ribs, imbedded therein with the washersiunder compression, andv a piston within; the barrel.

3. In a syringe, an outer shell, an inner medicament barrelhaving its `opposite ends; protruding beyond the ends otfthefshell, closure caps appliedfto'oppositevends ofthe; shell, sterilized substantially, liquid. proof,

felt washers contained within the capsfand,

having the ends ofthe barrel imbedded,

therein with the washersund'er compression f toV dstend. theA washers laterally, and

L In a; Syringe, .Y an; outer shell, minnen medicament barrel; aflosure cap, appl-iedta Y the" inj ector needle end off thashll', ,saidvcapg ing the barrel and an inner annular rib between the nipple and wall of the cap, and washers within the cap and having theend of the barrel imbedded therein, with the washers vunder compression, and a piston within the barrel.

f 5. In a syringe, an outer shell, an inner medicament barrel, a closure cap applied to one end of the; shell, said cap having an inner annular rib .in alinement with the end of the barrel and an external upwardly extending threaded stem, a stufing-box cap applied tosaid stem, washers interposed between said cap and the end of the stem, and y cap, said washers being under compression between said rib and the end of the and having the same imbedded therein, and a piston Within the barrel.

In testimony whereof I" aix my signature in presence of two witnesses.

ALBERT BANDMAN. Witnesses:

JosEPHINn BANDMAN, FLORENCE B. BLOCK.

barrel 

